A short Powerpoint presentation on functions of C language. How Functions are executed in a program,

1. “FUNCTION
IN
C- Programming”
PREPARED BY :- GAURANG VISHNOI

2. FUNCTION
What is function?
• A Function is a self contained block or a
separate block of a statements which are kept
together to perform a specific task in a
related manner.
• Every function must contain its definition as a
group of related statements to perform
specific task.

3. FUNCTION CALL
• Along with the function definition function call
is also important.
• A function has no use without its function call.
• A function can be called by any other function.
• A function which calls any other function is
called as caller function and the function
which is being called is known as called
function.

4. TYPES OF FUNCTION
FUNCTION
TYPE
PRE-
DEFINED
USER
DEFINED

5. PREDEFINED FUNCTION:-
• These are predefined function in c compiler
and their definitions are already available in
header file.
• Example- printf(), scanf(), pow().
• When ever we want to use these the function,
instead of writing the whole code we just
need to include the header file.
USER DEIFINE FUNCTION:-
• These are those function which are created by
user

6. User define function are of four type:-
1. No Argument No Return Type.
2. No Argument With Return Type.
3. With Argument No Return Type.
4. With Argument With Return Type.
WHAT ARE ARGUMENTS?
These are the data values which are passed from
the caller function to the called function.
TYPES OF ARGUMENTS:-
1. Actual Arguments.
2. Formal arguments

7. HOW FUNCTION WORKS
• Statement in the function are not executed
until the function is called
• A function can be called by any other function.
• A function which is calling any other function
is known as caller function.
• A function which is being called is known as
called function

8. ON
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OFF
{
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}
CH ++/CH --
{
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}
VOL++/VOL--
{
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}

9. ON OFF
CH+
CH-
VOL+
VOL-

10. THANK YOU…!!